Microwave synthesis and spectroscopic properties of ternary scheelite-type molybdate phosphors NaSrLa(MoO4)3:Er3+,Yb3+

NUV light induced visible emission in Er3+‐activated NaSrLa(MoO4)O3 phosphors for green LEDs and thermometer

“…The X-ray diffraction (XRD) patterns of NaSrLa(MoO 4 ) O 3 :xEr 3+ (x = 0.01, 0.02, 0.03, 0.04, 0.05, 0.06 and 0.07) phosphors are illustrated in Figure 1A. All the diffraction peaks of NaSrLa(MoO 4 )O 3 :xEr 3+ phosphors displayed similar results and these observed peaks were agreed well with previous results given by Lim et al 38 Also, there were no diffraction peaks corresponding to the impurity phases or raw materials, indicating the formation of a pure crystalline phase in the crystal lattices. To further verify the purity of phase, the general structural analysis system was adopted to refine the typical Rietveld structure refinement of NaSrLa(MoO 4 )O 3 :0.04Er 3+ phosphor.…”

“…For example, Lim and co‐workers observed excellent luminescence properties in NaCaLa(MoO 4 )O 3 :Er 3+ ,Yb 3+ phosphors . A similar phenomenon was also observed in NaSrLa(MoO 4 )O 3 :Er 3+ ,Yb 3+ compounds …”

“…37 A similar phenomenon was also observed in NaSrLa(MoO 4 ) O 3 :Er 3+ ,Yb 3+ compounds. 38 Considering the above discussion and the fact that the NaSrLa(MoO 4 )O 3 structure has not been thoroughly investigated, the Er 3+ -activated NaSrLa(MoO 4 )O 3 was selected as a representative sample to verify the dual-functional applications of the rare-earth ion-activated molybdates in pc-LED devices and non-contact optical thermometry. In this paper, the high-temperature solid-state reaction method was applied to successfully prepare Er 3+ -activated NaSrLa(MoO 4 ) O 3 samples.…”

Gd2Zr3(MoO4)9 microwave dielectric ceramics with trigonal structure for LTCC application

“…Because of overlapping features or the intensity of weak modes below the detection limit in Raman spectra, only qualitative analysis of the spectrum was implemented. The spectrum of Gd 2 Zr 3 (MoO 4 ) 9 ceramic has a broad gap between low frequency and high frequency modes and the intensive line in measured spectral range were also observed in analogy molybdate such as Zr(MoO 4 ) 2 , ZrMgMo 3 O 12 , Y 2 Mo 3 O 12 , Eu 2 (MoO 4 ) 3 , RbEu(MoO 4 ) 2 , NaSrLa(MoO 4 ) 3 . The primary bands in the range of 900‐1050 cm −1 , 750‐900 cm −1 , 320‐400 cm −1 , and 280‐320 cm −1 originated from vibrations of MoO4 tetrahedron (corresponding to symmetric stretching, asymmetric stretching, symmetric bending and asymmetric bending vibrations) .…”

“…The characteristic Raman spectrum with sharp peaks and wavenumber values is shown in Figure 7. Because of overlapping features or the intensity of weak modes below 53 The primary bands in the range of 900-1050 cm −1 , 750-900 cm −1 , 320-400 cm −1 , and 280-320 cm −1 originated from vibrations of MoO4 tetrahedron (corresponding to symmetric stretching, asymmetric stretching, symmetric bending and asymmetric bending vibrations). [54][55][56] The analysis of low-frequency phonon mode of α-ZrW 2 O 8 revealed those modes below 280 cm −1 were translational and librational motions of the polyhedron or Zr atom motions.…”